<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>特殊元素 Html</title>
</head>
<body>
<div class="box">盒子1</div>
<div class="box">盒子2</div>
<div id="nav">
  <ul>
    <li>首页</li>
    <li>产品</li>
  </ul>
</div>
<script>
  // 返回 html 元素
  const body = document.documentElement
  console.log(body)
</script>
</body>
</html>
